Re: Photoshop 6/7 problems with OptiCAL Monitor profiles
Re: Photoshop 6/7 problems with OptiCAL Monitor profiles
- Subject: Re: Photoshop 6/7 problems with OptiCAL Monitor profiles
- From: email@hidden
- Date: Thu, 13 Feb 2003 14:21:51 EST
In a message dated 2/13/03 1:51:52 PM, email@hidden writes:
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If I'm reading your results correctly, you've verified a certain level
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of
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consistency of the tags in the profiles produced by various utilities and
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instruments, and seem to have *not* experienced the OptiCAL/Photoshop
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profile translation issue I reported. EyeOne profile tags also translate
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to
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PS properly, and there were "minor" translation differences with Optix.
If what I did equates to the difference you are describing, then yes, that
would be the results I found today.
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I appreciate your looking into this, but I have to tell you that ColorVision
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themselves acknowledged the monitor profile Photoshop translation
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discrepancies via tech support email. And I know it isn't merely a Windows
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issue, because I demonstrated the problem to them on their own (Mac)
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equipment at their booth at PhotoPlus Expo 2002 at the Javits Center last
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Fall.
As I recall, that was *me* you demonstrated that to at PhotoPlus...
From what I've seen the profiled primaries values, as demonstrated
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in
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the OptiCAL Information palette numbers (and as matched in the older OptiCAL
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.ams files), are quite different from the profile primaries values seen
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by
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Photoshop.
Are the info pallet numbers of some significance to you? I ignored that part
entirely in my testing, as all I'm interested in is the profile's own tags,
and Photoshop's reading of them.
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Of course "quite different" to some may be insignificant to others. A
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typical example I found was: Blue y: .072 in OptiCAL Info palette, .064
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(rounded up) in Photoshop. Does this difference have any more impact on
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Photoshop image display than using a generic set of primaries vs measured?
Again, if this happens due to the math in the info pallette, and has no
effect on the profile tags and Photoshop's use of the profile, then its not a
functional problem, rather a reporting inconvenience...
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ColorVision tech support said that the issue was seen with any ICC profile,
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not just profiles created by ColorVision.
Hard to know, since no other application's profiles can be read in the
OptiCAL info window...
Perhaps some utilities have
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the
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same issue with Photoshop, and this is actually an Adobe fault with their
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"simple" monitor profile structure. Either way the primaries numbers are
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not being translated properly, by what I would consider a significant
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amount. I would think this has a negative impact on the accuracy of
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Photoshop's image display - a critical part of a PS color management
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process.
Are you sure this is happening at this level; have you confirmed it between
the profile tags and Photshop, or with multiple applications, not just using
the OptiCAL info window?
Since Photoshop is a primary target for monitor profiling
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utilities, I would think the profiling utilities companies would try to
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provide a solution, even if they technically are already ICC compliant.
The three I tested all appeared to be working just fine with Photoshop, give
or take the inevitable level of variation.
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The
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old .ams file output option previously supplied by OptiCAL had been a
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solution.
Have you considered that it might be your DTP92 that is the factor here?
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If you'd like, I can send you screen prints off-list to demonstrate typical
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results I see. Let me know. -Bob
If they are from the OptiCAL info window, I'm not really interested. If you
have profile tag to Photoshop variations, those I would indeed like to see.
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>
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PS - Very interesting to see results of your experiment between the various
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utilities, and even between colorimeters and spectrophotometers.
C. David Tobie
Design Cooperative
email@hidden
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